Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
YouLikeHits - YouLikeHits is an online service that brings results within seconds.
MailClark - The Slack bot for external communications
Linkcollider - Link Collider is a web-based service that is designed to grow your online business, social media networks, and personal blogs.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
LikesPlanet - Get Facebook likes, Twitter Followers, YouTube Subscribers, Comments, and Shares.